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If one of the masses of the Atwood's machine below is 2.8 kg, what should be the other mass so that the displacement of either mass during the first second following release is 0.34 m? Assume a mass
A 6.50 x 10^-5 M solution of potassium permanganate has a percent transmittance of 27.3% when measured in a 1.15-cm cell at a wavelength of 525 nm. Calculate the absorbance of this solution.
A skier is accelerating down a 30.0 ^circ hill at 1.80{rm{m/s^2}}. How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevati
A staging that weighs Wstaging supports a painter weighing 680 N. The reading on the left scale is 740 N and the reading on the right scale is 440 N. What is the weight of the staging?
A 3 gram bullet is fired horizontally into and remains in, a 16 kg block of wood suspended by a rope from the ceiling. The block swings in an arc, rising 4mm above its lowest position. What was the
An experimental rocket car moves along a straight track at a constant speed of 900.0m/s. The car passes a group of officials, travels a distance of 270.0 m and then explodes. If the officials hear t
A bag of blood with a density of 1050 kg/m^3 is raised about 1.00 m higher than the level of a patient's arm. How much greater is the blood pressure at the patient's arm than it would be if the bag
calculate the work done (in joules) when 34.1g of tin dissolves in excess acid at 1.03 atm and 25C. Assume ideal gas behaviour.
The energy difference in these two conformations has been measured to be about 23 kJ per mole. How much of this energy difference is due to the torsional energy of gauche relationships? Express your
By how much is the wind slowed when going through the turbine? Temperature of the air is 300K and its pressure is 1 bar. Air can be considered an ideal gas with Cv= 5R/2.
What is the car's maximum speed on an incline of 1 in 20 (ie, if theta is the angle of the incline with the horizontal, sin = 1/20)?
Calculate the number of kilograms of helium required to inflate a balloon with a volume of 100.000 L at a pression of 250 mmHg and atmospheric temperature of -35 ° C.
A treasure map directs you to start at a palm tree and walk due north for 15.0m. You are then to turn 900 and walk 22.0m; the turn 900 again and walk 5.00m. Give the distance from the palm tree and
A 83g arrow is fired from a bow whose string exerts an average force of 125N on the arrow over a distance of 81cm. What is the speed of the arrow as it leaves the bow?
If air contains 78% N2 by volume, what is the solubility of N2 in water of 25oC and 1 atm (Henry's constant kH for N2 in H2O at 25oC = 7 x 10-4 mol/L.atm)?
If the volume of ocean water (calculated above) contains 3.7 percent sodium chloride ("salt") by mass and the density of the water is 1.41 g/mL, calculate the total mass of sodium chloride.
A water trough is 9 m long and has a cross-section in the shape of an isosceles trapezoid that is 40 cm wide at the bottom, 100 cm wide at the top, and has height 60 cm. If the trough is being fille
Calculate the number of grams of solute that would be needed to make each of the following solutions
What is the composition in mole fractions of a solution of benzene and toluene that has a vapor pressure of 35 torr at 20 °C?
At a picnic, a Styrofoam cup contains lemonade and ice at 0°C. The thickness of the cup is 4.0 10-3 m, and the area is 0.015 m2. The temperature at the outside surface of the cup is 28°C. Th
a) A saturated silver chloride solution contains 1.58 x 10-4 g silver chloride per 100 mL solution. What is the molarity of the solution?
A particular snack mix contains 1.30 g of salt per 100 g of the mix. How much mass of the mix can be consumed and still be within the FDA limit of 2.40 g of salt?
A refrigerator has a surface area of 5.5 m2. It is lined with 0.066-m-thick insulation whose thermal conductivity is 0.030 J/(s·m·C°). The interior temperature is kept at 5°C,
How many grams of glucose (C6H12O6) must be dissolved in 563 gram of ethanol (C2H5OH) to prepare a 2.40 x 10-2 m solution?
A 82 kg diver steps off a 12 m tower and drops from rest straight down into the water. If he comes to rest 4.0 m beneath the surface, determine the average resistance force exerted on him by the wat